I know folks will tell me the "Like" button is the same as "Thanks" but it's one of my concerns. Most of our users think "Thanks" is built into vB. Going a step farther, I've hacked it and added "Laughing" and "Praying" mods too. The "Praying" mod is only available on a forum for prayer requests and praises. It gets a great deal of use. As you can guess, "Praying" is a better response to "My grandma died" than "Like"!
The Laughing specifically says "The following users laughed with...." so it can't be used for "laughing at." It gets a lot of use. "Like" would work there, but sometimes "Laughing" is a lot more appropriate.
I can see that "Thanks" and "Like" are pretty much interchangeable.
When I told the guy who pays the bills that I'm thinking about changing forum software, his primary response was, "Anything you think is best, but let's be sure we keep the 'Thanks' mod."
With the existence of "Like" already in place, I doubt anyone will port the, now unsupported anyway, "Thanks" mod, and even if they did, I don't know that I'd be able to hack my way back to the "Laughing" and "Praying" versions of it as I'm not a coder.
This is one issue of which I'm well aware that needs to be sorted out, even as this thread is helping me identify things I hadn't thought about.